Bell GT6 RD ULTRA-4C Carbon Helmet
Pre-Order Only. ETA is Q1 of 2026.
FIA 8859-2024 and Snell SA2025 Homologation
The Bell GT6 RD ULTRA-4C is a closed-cockpit performance helmet built for drivers who want ultra-light carbon construction with integrated communications and hydration capability out of the box. A wide eye port, refined aerodynamics, and efficient ventilation keep vision clear and fatigue low through long stints.
The GT6 RD ULTRA-4C features the same modern and aggressive design as the HP6 RD-4C revised for racers in closed-car environments, featuring a wide eyeport for extended vision and a lightweight premium carbon glass shell. The closed-face GT6 RD ULTRA-4C integrates the latest technology from ZeroNoise® including advanced electronics, input for earpieces, and noise canceling microphone to assure outstanding performance, sound insulation and communication efficiency.
4C: Carbon Composite 4 Layer Construction
On Bell helmets, “4C” stands for “Carbon Composite 4 Layer Construction.” It refers to the shell technology Bell uses: a four-layer carbon composite laminate. This blend typically combines carbon fiber with other advanced fibers (like Kevlar or fiberglass) in multiple layers.
The purpose is to deliver a shell that is lighter than fiberglass alone, but more affordable and versatile than Bell’s top-end full carbon HP series shells (like HP7 or HP77, which use pure carbon/advanced aerospace layups). In this helmet, "RD-4C” means the helmet is a Carbon Composite 4-layer shell with RD (radio/drink) kit integration.
Designed for GT and Closed-Cockpit Racing
The RD configuration includes electronic ear cups and drink-tube routing for clean, reliable comms and hydration in noisy, high-heat cabins. Internal channels manage airflow across the crown and face, and the shell profile is tuned for stability with optional aero accessories.
Bell GT6 RD ULTRA-4C Helmet Details
- Manufacturer: Bell Helmets
- Manufacturer part no.: 123925x
- Construction: lightweight 4C carbon-composite shell
- Homologation: Snell SA2025 and FIA 8859-2024
- Configuration: RD (integrated electronic ear cups and hydration routing)
- Interior: fire-resistant comfort liner
- Orientation: closed-cockpit optimized, wide eyeport
- Hardware: factory-installed M6 HNR terminals
- Finish: gloss carbon-composite
- Shield: clear shield installed (tinted/iridium options available separately)
Key Features
- Ultra-light carbon shell for reduced fatigue and quick head-turn response
- Equipped with Bell Racing SmartLock Mechanism
- Multi-density, multi-piece liner for impact energy management
- Integrated channels for radio wiring and drink-tube routing
- Wide eye port for enhanced lateral vision in GT cars
- Efficient intake/extraction paths to promote airflow in warm cabins
- Compatible with optional top-forced-air and aero kits (rear spoiler, gurneys)
- Sealed eye port gasket to help reduce dust and moisture ingress
Bell GT6 RD ULTRA-4C Helmet FAQs
What does “RD” mean on this model?
RD indicates the helmet is set up for radio communications and drink-tube routing, with electronic ear cups installed for improved audio clarity.
Is this helmet optimized for closed-cockpit use?
Yes. The GT6 platform is tailored for GT and closed-cockpit cars, with a wide eyeport for peripheral vision and venting tuned for in-car airflow.
Can I connect a top forced-air system?
Yes. The shell accepts optional top forced-air kits, allowing you to feed cooled air into the helmet for longer stints and hotter events.
Are hydration and radio systems included?
The RD configuration provides integrated routing and ear cups; specific drink and radio hardware is typically added to suit your team’s setup.
Does it include HNR anchor points?
Yes. Factory-installed M6 HNR terminals are fitted for head-and-neck restraint compatibility.
Which shield options are available?
A clear shield is installed. Tinted and iridium options are available separately to suit lighting conditions and driver preference.
Lightweight carbon construction, integrated comms/hydration, and closed-cockpit visibility make the Bell GT6 RD ULTRA-4C a smart upgrade for serious GT drivers. Order yours from Competition Motorsport and get race-ready support.
